ASIN(3) | Library Functions Manual | ASIN(3)

# NAME

asin, asinf, asinl — arc sine function

# LIBRARY

Math Library (libm, -lm)

# SYNOPSIS

#include <math.h>

double
asin(double x);

float
asinf(float x);

long double
asinl(long double x);

# DESCRIPTION

The asin(), asinf(), and asinl() functions compute the principal value of the arc sine of x in the range [-pi/2, +pi/2].

# RETURN VALUES

If |x|>1, asin(x), asinf(x), and asinl(x) return NaN and set the global variable errno to EDOM.

# SEE ALSO

acos(3), atan(3), atan2(3), cos(3), cosh(3), math(3), sin(3), sinh(3), tan(3), tanh(3)

# STANDARDS

The asin() function conforms to ISO/IEC 9899:1999 (“ISO C99”).

January 29, 2013 | NetBSD 7.2